Dynamic Asset Allocation: Portfolio Decomposition Formula and Applications

Jerome Detemple and Marcel Rindisbacher

The Review of Financial Studies, 2010, vol. 23, issue 1, 25-100

Abstract: A new decomposition of the optimal portfolio, in dynamic models with von Neumann--Morgenstern preferences and Ito prices, is established. The formula rests on a change of numéraire that uses pure discount bonds as units of account. The dynamic hedging demand has two components. The first hedge insures against fluctuations in an optimally designed bond with a maturity date matching the investor's horizon. The second hedge immunizes against fluctuations in the market price of risk in the bond numéraire. Various applications are examined. New results concerning the behavior of extremely risk-averse individuals, the demand for bonds and its long-horizon limit, and the optimal portfolio in incomplete markets are derived. The Author 2009. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Date: 2010
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